Fleet of supersonic jet training aircraft T-38 U.S. Air Force is considered somewhat vulnerable despite his condition, and equipment to be maintained until the arrival of a new training aircraft by 2020.The aircraft made by Northrop whose age has reached about 40 annual, has been used to train prospective pilots F-15, F-16, F-22, A-10 attack aircraft and B-1 bomber.Vulnerability to T-38 fleet which numbers no less 546 unit, triggered by the collapse of a T-38 in 2008 which caused damage to the aileron level. After doing the research, all suspected of aileron levels have been replaced.In a further study found 156 items of potential danger meimbulkan.Now more than 80% aramada training aircraft has been investigated, only two of which require replacement.AU suggested that T-38 avionics system modernized so that prospective pilots from the beginning has been accustomed to what they will face in the cockpit of the F-22 or F-35.